wrong: has unspecified generic parameters when using generic template inside a generic proc

[timotheecour]

rnim -d:case1 bugs/t77_unspecified_generic_parameters.nim
nim c --nimcache:/tmp/nim//nimcache/ -o:/tmp/nim//app -r -d:case1 bugs/t77_unspecified_generic_parameters.nim
/Users/timothee/git_clone/nim/timn/bugs/t77_unspecified_generic_parameters.nim(8, 17) Error: 'bar' has unspecified generic parameters
  proc foo[T]() = bar[int]()

when defined(case1):
  # Error: 'bar' has unspecified generic parameters;  proc foo[T]() = bar[T]()
  template bar[T]() = discard
when defined(case2):
  # ok
  proc bar[T]() = discard

proc foo[T]() = bar[int]()

[metagn]

Works now probably due to #21671